<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        .box {
            position: relative;
            margin: 100px auto;
            width: 200px;
            height: 200px;
        }
        .box div {
            position: absolute;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            line-height: 200px;
            text-align: center;
            border-radius: 50%;
        }
        .one {
            background-color: skyblue;
            z-index: 1;
        }
        .two {
            background-color: pink;
            transform: rotateY(180deg);
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="one">前端程序员</div>
        <div class="two">web60期</div>
    </div>
</body>
</html>